Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer beneath your...
https://www.protopage.com/samuel-flores05#Bookmarks
Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer beneath your skin, reaching deeper than most RF devices, which heat tissue around 40 to 45°C. Compared to standard HIFU, Ultherapy offers precise energy delivery